Everything wrong with the new ten-part PBS documentary on the Vietnam War is apparent in the first five minutes. A voice from nowhere intones about a war “begun in good faith” that somehow ran off the rails and killed millions of people. We see a firefight and a dead soldier in a body bag being winched into a helicopter, as the rotor goes thump, thump, thump, like a scene from Apocalypse Now. Then we cut to a funeral on Main Street and a coffin covered in Stars and Stripes, which multiply, as the camera zooms out, into dozens and then hundreds of flags, waving like a hex against warmongers who might be inclined to think that this film is insufficiently patriotic.